On Monday, the Russian RTS dollar denominated equity index nosedived more than 12%, The Russian government bond index slipped more than a percentage point while the Russian central bank was forced to hike its key interest rate by 1.5 percentage points to defend the ruble after the currency slumped to fresh lows against the dollar and the euro.

A squeeze on Russia’s assets means a squeeze on its most wealthy. Russia’s oligarchs, the super-wealthy cadre of businessemen, control great swathes of the nation’s wealth via private companies, most with close ties to Vladimir Putin’s government.

This is an unscientific attempt to quantify how much pain they’re feeling in their listed assets, and how the indexes has performed in the sectors in which they hold assets privately.

Alisher Usmanov

Alisher Burkhanovich Usmanov.

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Mr. Usmanov is Russia’s wealthiest man according to Forbes’s most recent World’s Billionaires List, published March 24 2013, with a net worth of some $18.6 billion before the latest market ructions. He controls private investment vehicle USM Holdings, through which he owns, for example, 60% of the mining company Metalloinvest, according to USM’s website.

But he has publicly-listed assets too. He owns nearly 30% of the Russian mobile operator MegaFon, whose shares were down 11.7% Monday, equating to a paper loss of $650 million. He also holds around 11% Mail.Ru, the Russian internet company. Mail.Ru’s shares are down 15%, equating to a paper loss $125 million, derived from holdings data listed on the USM website.

Mikhail Fridman

Mikhail Fridman.

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Mr Fridman is worth some $17.6 billion, according to the Forbes list.

He controls oil, telecoms and finance assets through the Alfa Group which he owns together with German Khan and Alexey Kuzmichev. Many of these assets, like Alfa-Bank, in which he has a 36% shareholding, are privately held. But Alfa Group also has a 48% stake in Russia’s X5 Retail group. Its shares were down 11% in dollar terms Monday, representing around a $250 million paper loss to Alfa Group.

Russia’s RTS oil & gas index was down 9.34% in dollar terms today. The financial index was down 15.2%.

Mr. Vekselberg is worth $17.2 billion according to the Forbes list, with much of his holdings in Renova Group, a private business. It owns stakes in mining firm UC Rusal, whose shares dropped 3.75% Monday. Mr Velkselberg has a large investment in Swiss steelmaker Schmolz+Bickenbach, down 2.4% on Monday.

The RTS metals & mining index was down 11.2% Monday, electric utilities down 17%, and industrials down 14.8%.

Vladimir Lisin

Vladimir Lisin.

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Mr. Lisin is worth $16.6 billion according to Forbes’ latest billionaires list, owns substantial stakes in railway operators having made his money in metals trading. His assets are held privately. The RTS transport index was down 16.4% today.

Leonid Mikhelson

Leonid Mikhelson (R) with Russian President Vladimir Putin.

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Mr. Mikhelson is worth some $15.6 billion according to Forbes. Novatek, the oil, gas and coal firm in which he has a stake, dived 16.8% in dollar terms Monday, while the Sibur petrochemical company in which he has a majority stake is privately held.

None of the Russian investors was available for comment, though a representative of Renova said that the market’s drop had no impact on the firm’s financial situation.

Here’s how ten Russian dollar-denominated RTS indexes have performed today in percentage terms, with data supplied by the Moscow Stock Exchange: